{"product_id":"carrier-ch13na02500gaaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V-24V for CH13NA02500GAAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V-24V for Model CH13NA02500GAAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier CH13NA02500GAAAA\u003c\/strong\u003e split-system air conditioner. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, and all low-voltage control circuits. When it fails, the entire control system goes dark — your thermostat goes blank, the system won't respond to any call for cooling or heating, and no safety or diagnostic functions operate. A failed transformer is often mistaken for a bad thermostat or control board, making it a smart first diagnostic step.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 control circuit transformer | OEM part number HT01AW229 | Factory-matched construction for Carrier CH13NA02500GAAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Undersized or off-tolerance generic units can cause nuisance tripped fuses, erratic thermostat behavior, or premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter for verification. Label and photograph all low-voltage wiring connections before removal. Confirm 24V output at secondary terminals after installation before restoring system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eCH13NA02500GAAAA\u003c\/strong\u003e split-system condenser. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment — call or chat before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909639131507,"sku":"CARRIE-CH13NA02500GAAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909639164275,"sku":"CARRIE-CH13NA02500GAAAA-TRANSFORMER-HT01AW229-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01AW229_1f7d8978-4c62-4733-bd06-dbf09d73420f.jpg?v=1782939398","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na02500gaaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}